Art of box making



June 16, 1931.

c. D. KNOWLT ON- ART OF BOX MAKING Filed Au 29. 192'? 2 Sheets-Sheet l June 16, 1931. c. 0. KNOWLTON ART OF BOX MAKING Filed Aug. 29. 1927 2 Sheets-Shee t 2 Patented June 16, 1931 UNITED STATES PATENT; OFFICE CUTLER D. KNOWLTON, 'OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO HOAG-UE-SPRAGUE CORPORATION, OF LYNN, MASSACHUSETTS, A. CORPORATION OF IASSACH'USE'I'TS ,ART or BOX MAKING- Application filed August 29, 1927. Serial No. 216,220.

This invention relates to the art of making boxes, being specially concerned with a method of producing asmooth, finished edge where the box-material is divided, as at the corners of the box. The novel features embodied in the blank and box illustrated and described herein as produced by carrying out this method are made the subject of a divisional a plication in my name filed in the United' tates Patent 1930, with the Serial No. 427,206.

When boxes of the type disclosed in Patent No. 1,476,549, Smith, December 4, 1923, and consisting of a pasteboard shell covered with paper, are made by assembling the shellmaterial and cover-material before the boxes are set up, there are left exposed, unless precautions are taken to hide them, unsightly strips of shell-material. This may occur, for example, at the vertical edges of the wings which overlie the corner-laps at the ends" of the boxes.

An object of the invention is to attain, by a simple procedure, an efi'ective concealment of the shell-edges. Tothis end, the sheet from which the blank and the resulting box are to be formed is out or scored at opposite sides, divided in a plane joining the cut lines to give a reduced marginal extension, and such margin bent and secured to an adjacent surface of the sheet. In the production of the blank the margin may or may not be thus attached, in the preferred form of the invention it being secured to an adjacent wall of the box when this is set up, Herein, I provide for theassembling of the shell or body material with the cover-material, the scoring. of these upon lines spaced transversely of the assembled sheet, as at the meeting of the end wings and corner-laps, and the splitting of the shell-material between the scores. When the resulting blank is set up into box-form,

the inner face of the splitmargin upon an end wing is preferably secured to the adjacent side wing, with the cover-material exposed and thev raw edge of the shell almost entirely concealed. At the same time, this attached marginal extension acts as a stay for the box-corner at themeeting of the side and end wings.

Office on February 10,

the accompanyin drawmgs' 1 and 2 sugggst, diagrammatically and in perspective, ap aratus by which my improved method may carried out;

Fig. 3 is an enlarged transverse section through the scoring mechanism;

Fig. 4is an enlarged longitudinal section through the splitting mechanism;

Fig.5 shows the forming mechanism in its initial position;

Fig. 6 is a perspective view of a portion of a box formed by the present method; and

Fig. 7 is a similar view of a modification of such box. When here and elsewhere in the specification a box is referred to, it is to be understood that the invention applies as well to the production of box-covers as to the bodies.

' In making the box of Fig. 6 by a continuous-production method, I prefer, though it is not essential to the success of the invention, to advance a web of pasteboard A or other material suitable for the box-shell, this web being mounted upon a spindle 10, while adj acent to it a web of such cover-material B as paper is arranged to turn upon a spindle 12. Glue or other appropriate adhesive is apghed to the inner face of one of the webs, as

by a device 14, after which said webs are assembled by being pressed together andare advanced by a pair of rolls 16, 16. The coverweb may be somewhat Wider than the shellweb and is shown as turned over at a and forced against the under side of the shell, which is at the inside of the box, by opposite folding abutments 18, but one of which is shown, By a. mechanism 20 the assembly is provided with longitudinal creases b, Z2, which mark the j unctures of the box-bottoms c and side wings d and between the end wings e and the comer-laps f. A mechanism 22 creases the assembly defining the successlve toms c and end wings e and between the side Wings (1 and the comer-laps f. By a roll mechanism 24 each box-section of the assem- It, preferably substantially coinciding with transversely at g, thus lines between the botthe crease-lines b and extending along the junctures between the end Wings and cornerlaps of adjacent sections. At the same time, the upper or cover-paper side is scored by circumferential knives 28, 28 somewhat separated from the knives 26 transversely of the sheet. The lines '5, 2' thus out are spaced outwardly from the lines h, to which they are parallel. At their adjacent ends, each line i is joined to the vertical plane through the companion line h by an inclined line j which is scored in the material by a knife 30. At its opposite or outer end, each line 2' is shorter than the corresponding line h, and here an inclined score-line 7c connects the lines 71 and 72., being produced by a knife 32. The lines j and I: which are on the same corner-lap converge outwardly to the line i which connects them. The bottoms of all these scores terminate in a common plane Z parallel to the outer faces of the sheet. In the present instance, this plane is shown as about one-third of the distance through the assembly from the cover-paper side. As will hereafter appear more clearly, there may be conditions which call for a change in the relation between the depths of the scores. After being scored, the assembly is acted upon by cutting mechanism 3a, which divides it into individual box-blanks G, the separation occurring along transverse lines m passing through the ]unctures of the scores 7'. The blanks thus divided are shown as accumulated in astack within a recelver The blanks may now have the corner-laps separated from the end wings to which they are connected, at the same time there being a marginal extension of reduced thickness created upon each extremity of the end wing. A means for effecting this is illustrated in connection with the setting-up apparatus of Fig. 2. The blanks, in a direction at right angles to that which they followed in the assembling operation, are advanced between opposite pairs'of rotatable rolls 3S and -10.

Each roll 38 has a pair of projections 42, so arranged that in connection with a registering depression in the corresponding bed-roll 40 it will act to force apart oneof the cornerlaps and connected end wing in a direction substantially at right angles to the plane of the blank. The force applied in this direction causes the material to tear, first along the score and the outer extremity of the score h, then upon the lines it and 2', and finally upon the line It: to the termination of the line b. Throughout this division. the pasteboard splits in substantially the plane 7 common to the edges of the knives lb. 29, $30 and 32, and therefore to the bottoms of the scores which they produce. The inclination of the scores and 7.: at the beginning and end of each divided area reduces the tendency of the division or tear to lca\e the scored lines and folding it upon itself.

mutilate the cover-paper upon the marginal extension. The division of each corner-lap from the end wing at each side of the blank may be completed by a curved deflecting rail 44, beneath which the corner-lap passes while the roll-projection 42 is still pressing it down. There is thus produced upon'each extremity of each end wing a comparatively thin extension or flap n, its outer face completely covered with paper, within which is a substantial thickness of shell-material with its inner face approximately parallel to the paper. On the associated corner-lap there is a similar extension 1', which, in the present instance, is thicker than n. The rails 44 bring the corner-laps to positions substantially at right angles to the remainder of the blank, and there retain them while each end wing, upon its under or shell-side, is acted upon by a gluing mechanism 46 which coats the surface, including the extensions. From the. gluing mechanism the blank is carried upon a vertically reciprocatory form &8 of a setting-up mechanism 50. The form rises, with the blank upon it, between opposite abutments 52, 52, which turn down the side wings (Z to vertical positions, at the same time carrying the corner-laps across the ends of the form. Then horizontally reciprocatory plungers 5%, 5% act, upon further elevation of the form, to fold the end wings at the creases g and to press their glued faces against the. corner-laps. At the same time, the coaied extensions 91. are forced into engagement with the adjacent surfaces of the side wings through the agency of flanges 56 at each side of each' plunger. This completes the formation from the blank C of a box I). ()no extremity of this box is shown in Fig. 6.

It will be seen that at the vertical corners of the box only finished edges appear, covered smoothly by paper, which, on account of the uniformity of thickness of the extensions 11, show no surface-irregularities. The edge of the shell-material in each extension may be so thin as to be inconspicuous. Nevertheless, there is a sullicicnt thickness of the combined shell and cover-material to furnish an effective stay, greatly strengthening the creased material at the meeting of each side Wing and the corner-laps. The corner-lapextensions '2' lie along the lower edges of the end walls, perforn'iing no special function.

My invention may also be employed for producing finished edges in another manner. Instead of securing the extension to a wall of the box adjacent to that which carries it. it may be attached to the same wall, as by Referring to Fig. 7, we have the same general bOX-FtI'HCtlH'B l) as it is in Fig. 6, but here the end-wing extension 0 is made of substantially half the thickness of the assembly and after gluing is doubled upon itself before the end wing is secured to the corner-laps. This provides an also giving a uniform thiclmess of the wing,

so that its surface is smooth throughout.

Having described my invention, what I claim as'new and desire to secure by Letters Patent of the United States is:

1. The improvement in the art of making boxes which consists in cutting opposite sides of asheet, dividing the sheet in a plane joining the cut lines to form a reduced margin, and bending said mar and securing itto an adjacent surface 0 the sheet.

2. The improvement in the art of making boxes which consists in cutting opposite sides of a sheet along lines spaced from each other and along connecting lines, dividing the sheet in a plane joining thecut lines to form a reduced margin, and bending such margin and securing it to an adjacent surface of the sheet. j i

3. The improvement in the art of making boxes which consists in cutting opposite sides of a sheet, the cuts terminating in a plane substantially parallel to the surfaces of the sheet, dividing the sheet in a plane joining the cut lines to form a reduced margm, and'bending said margin and securing it to an adjacent surface of the sheet.

4. The improvement in the art of making boxes which consists'in applying to a side of a sheet a finishesurface, cutting opposite sides of the sheet, dividing the sheet in a plane joining the cut lines to form a reduced margin, and bending such margin and securing it with the finish-side out to an adja-' shell-material, cutting the assembly into discent surface of the sheet.

5. The improvement in the art of mail:- g boxes which consists in cutting dpposite sides of a sheet, the cuts terminating m a' plane substantially 'parallel to the surfaces of the sheet and nearer one of said surfacm than the other; dividing the sheet in aplane joining the cut lines to form a reducedmargin, and bending said margin and securing it to an adjacent surface of the sheet.

6. The improvement .in the art of making boxes which consists in securing together a sheetof shell-material and a sheet ofwovermaterial, scoring through the cover-material into the shell-material, scoring the side of the shell-material opposite the cover-material, the scores being spaced from each other transversely of the sheet, dividing the shell-material in a plane joining the scored lines to form a reducedmargin, and bending and securing such margin with the shell-material concealed. V

7. The improvement in the art of making boxes which consists in securing together a sheet of shell-material and a sheet of covermaterial, scoring through the cover-material into the shell-material along a straight line, with lines converging toward each other at the ends of the straight line,scoring the side of the shell-material opposite the cover-material along a line connecting the inner extremities of the converging lines, dividing the shell-material in a plane joining the scored lines to form a reduced margin, and bending and securing such margin with the shell-material concealed.

8. The method of making boxes which conform, and securing the reduced margin to an adjacent surface 9; The method of making boxes which consists in scoring opposite sides of a sheet of box-material along separated lines, dividing the sheet between the scored lines to form a reduced margin extending from the ed e of one wall, setting up the sheet in boxorm,

andsecuring the reduced margin to the adjacent wall.

10. The method of making boxes which consists in creasing sheets of box-material to furnish fold-lines, scoring opposite sides of the sheets, dividing the material between the scored lines to form reduced margins, bending the material'at the creases into box-form, and securing the reduced margins to the adjacent walls of the box.

11. The method of making boxes which consists in securing together a web of shellmaterial and a web of cover-material, creasing the assembly to furnish fold-lines, scoring opposite sides of the assembly, the resulting scores terminating in a plane within the crete blanks, dividing the material between the scored lines to form reduced margins in-- eluding cover-material inthe'outer faces,-

bending the blanks at the creases intoboxform,- and. securing the reduced'margins to the adjacent walls of the box with the covermaterial exposed.

12. The method of making boxes which consists in cutting a sheet of box-material at opposite sides along lines separated transversely of the sheet, splitting the material be 14. The method of making boxes which 1 consists in creasing box-material to define the bottom, side and end wings and corner-laps, scoring the inner side of the material at the junetures of the end wings and corner-laps, scoring the outer side of the material between the first-mentioned scored lines and the opposite edges of the corner-laps, splitting the material between the scored lines to separate the end wings and the corner-laps, and setting up the box.

15. The method of making boxes which consists in creasing box-material to define the bottom, side and end wings and cornerlaps, scoring the inner side of the material at the junctures of the end wings and cornerlaps, scoring the outer side of the material between the first-mentioned scored lines and the opposite edges of the corner-laps, splitting the material between the scored lines to separate the end wings and the corner-laps to form reduced end-wlng extensions, and setting up the box with the end-wing extensions secured to the side wings.

' 16. The method of making box-blanks which consists in cutting a sheet of box-material at opposite sides along lines separated transversely of the sheet, and dividing the sheet in a plane joining the cut lines.

17. The method of making box-blanks which consists in cutting a sheet of box-material at opposite sides alonglines separated transversely of the sheet and along additional lines connecting the separated lines at one side of the sheet, and dividing the sheet in a plane joining the cut lines.

18. The method of making box-blanks which consists in creasing a sheet of boxmaterial to furnish fold-lines, scoring the sheet-at one side along a crease, scoring the opposite side of the material alon a line ad acent the crease, and splitting t e material between the scores.

19(The method of making box-blanks which consists in creasing a sheet of box-material to furnish fold-lines, scoring the sheet at one side along a crease, scoring the oposite side .of the material along a line adacent the crease and along the lines converg-' ing from the extremities of said line, and splittin the material between the scores.

20. he method of making box-blanks which consists in securing together a sheet of shell-material and a sheet of cover-matematerial into the shell-material adjacent a crease-line, scoring the side of the shell-material opposite the cover-material at a' crease,

and splitting the material between the scores.

22. The improvement in the art 'of making boxes which consists in cutting opposite sides of a sheet, divlding the sheet in a plane joining the cut lines to form a reduced margin,

and bending said margin and securing it to its adjacent portion.

23. The method of making boxes which consists in scoring opposite sides of asheet of box-material along separated lines, dividing the sheet between the scored lines to form a reduced margin, doubling the reduced margin upon itself, and setting up the sheet in box-form.

24. The method of making boxes which consists in creasing box-material to define the bottom, side and end wings and cornerlaps, scoring the inner side of the material at the junctures of the end wings and cornerlaps, scoring the outer side of the material between the first-mentioned scored lines and the opposite edges of the corner-la s, splittingv the material between the score lines to separate the end wings and corner-la s to form reduced end-wing extensions, dou ling the end-wing extensions upon themselves, and setting up the box.

25. The method of making box-blanks which consists in cuttin a sheet of box-material at opposite sides a on lines separated transversely of the sheet, dlviding the sheet in a plane oining the out lines, and doubling upon itself one side of the material divided along each line.

- 26. The method of making box-blanks which consists in cutting a sheet of box-material at o posite sides along lines separated transverse y of the sheet to separate end wings and comer-laps, dividing the sheet in a plane joining the cut lines to produce extensions from the end wings and corner-laps, and doubling the end-wing extensions upon themselves and securing them in place. In testimony whereof I have signed my name to this specification. 

